Fungicidal furanone derivatives

Abstract

The invention provides furanone derivatives of the general formula ##STR1## in which R 1 represents a halogen atom or an optionally substituted alkyl or alkoxy group, R 2 represents a halogen atom or an optionally substituted alkyl, aryl or heterocyclyl group, R 7 represents a C 1-4 alkyl group and Q represents an optionally substituted morpholino or amino group; processes for their preparation; compositions containing such compounds and their use as fungicides.

We claim: 
     
       1. A compound of the formula ##STR32## in which R 1  represents a halogen atom or an optionally substituted alkyl or alkoxy group, R 2  represents a halogen atom or an optionally substituted alkyl, aryl or heterocyclyl group,   R 7  represents a C 1-4  alkyl group, and   Q represents an optionally substituted morpholino or amino group.   
     
     
       2. A compound according to claim 1 in which R 1  represents a halogen atom or a C 1-6  alkyl or C 1-6  alkoxy group optionally substituted by one or more halogen atoms. 
     
     
       3. A compound according to claim 1 in which R 2  represents a halogen atom, a C 1-6  alkyl, naphthyl or 5- or 6-membered heterocyclyl group each optionally substituted by one or more halogen atoms, or a group ##STR33## where R 3  and R 4  independently represent a hydrogen or halogen atom or a C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, C 1-6  haloalkoxy, nitro, amino, C 1-6  alkylmino, di-C 1-6  alkylamino or phenyl group. 
     
     
       4. A compound according to claim 1 in which Q represents a morpholino group or a group ##STR34## where R 5  represents a phenyl group or a C 1-6  alkyl group optionally substituted by a C 3-8  cycloalkyl, phenyl or cyano group, and R 6  represents methyl or ethyl. 
     
     
       5. A compound according to claim 1 in which R 1  represents a methoxy group; R 2  represents a naphthyl, pyridyl, furyl, thienyl, chlorothienyl, phenyl, chlorophenyl, dichlorophenyl, methylphenyl, bromophenyl, butylphenyl, methoxyphenyl, nitrophenyl, trifluoromethyl phenyl, dimethylaminophenyl or biphenyl group; R 7  represents methyl and Q represents a morpholino group. 
     
     
       6. A fungicidal composition which comprises a carrier and, as active ingredient, a compound of formula I as defined in claim 1. 
     
     
       7. A method of combating fungus at a locus which comprises treating the locus with a fungicidally effective amount of a compound of formula I as defined in claim 1. 
     
     
       8. A method according to claim 7 in which the locus comprises plants subject to or subjected to fungal attack, seeds of such plants or the medium in which the plants are growing or are to be grown. 
     
     
       9. A method of combating fungus at a locus which comprises treating the locus with a fungicidally effective amount of a composition as defined in claim 6.